Bruises on the feet may be caused by subcutaneous stasis, blood-related diseases, etc. The details are as follows: 1. Subcutaneous stasis: usually caused by subcutaneous stasis or subcutaneous bleeding, the vast majority of such cases are still due to inadvertent trauma, or subcutaneous bleeding caused by trauma. This kind of bleeding in the case of subcutaneous tissue loose, easy to accumulate underneath, usually no great impact, by their own absorption, there is no additional to speed up the method, the important thing is to try to avoid re-trauma. 2, blood-related diseases: some may be due to blood-related diseases, platelet reduction, etc., resulting in platelets very low or platelet function can not, a little touch or may be Therefore, there is generally no major problem, if necessary, go to general surgery, hematology, check the blood routine and physical examination, to assess the relevant problems.